Class Description

____________________ 

TPartSieveHists

Particle ID Histogramming service

Created at UNH by Maurik Holtrop

TPartSieveHistograms supports the TPartSieve class by providing a number of generally useful histograms that help determine the correct settings of the particle cuts. It is thus rather linked to the TPartSieve class. Since opinions on what cuts are best differ, and thus which histograms are useful differ, these classes will never satisfy everyones tastes.

Use:

See TPartSieve for use of that class.

This class should be initialized in the initialization of your analysis code. It will create a standard set of histograms in the directory "SieveHists".
In your event loop you would want to call the Fill() method right after sieving the particles.
After the loop is finished you can write the collection of histograms out to disk with the Write() method.

Example Code:

{
TClasTool *ct=new TClasTool();
ct->InitDSTReader();
ct->SetBeamEnergy(5.015); // in GeV 
ct->Add("mydata.root");   // WriteRootDST file with data.
TPartSieve *Sieve=new TPartSieve(ct,0x03); // 0x03 is the control flag.
TPartSieveHistograms *SHists=new TPartSieveHistograms(Sieve);
Sieve->SortOn();
Sieve->ConfidenceOn();
for(Int_t ievt=0;ct->Next();ievt++){
   Sieve->SieveEvent();
   SHists->Fill();
   //
   // Do analysis
}
TFile fs("SieveHists.root","CREATE");
SHists->Write();
fs.Close();
}

Additional information about this package, including an overview, can be found at the ClasTool Documentation web pages.